God can set about creating a heaven (8)
I believe the answer is:
valhalla
'a heaven' is the definition.
(Valhalla is an example)
'god can set about' is the wordplay.
'god' becomes 'Allah' (Arabic name for God).
'can' becomes 'lav' (synonyms).
'set about' is a reversal indicator.
'allah'+'lav'='allahlav'
'allahlav' in reverse letter order is 'VALHALLA'.
'creating' is the link.
(Other definitions for valhalla that I've seen before include "Vikings' afterworld" , "Where the souls of heroes go in Norse mythology" , "In Scandinavian myth, the hall of dead heroes" , "Scandinavian paradise" , "Where the souls of slain heroes were received by Odin" .)